CamperHardlyKnowHer

Forest River Berkshire 390QS

Class Abuilt 2008–12Mixed build tierFindable on the used market
WHAT ONE COSTS
price not published

The maker never published an MSRP for this floorplan. Unknown is not cheap — treat any asking price against comparable models, not against zero.

THE SPECS
Length39.8 ft
Height (incl. A/C)12.4 ft
Width8.3 ft
Interior height7.0 ft
GVWR28,000 lb
Dry weightnot published
Sleeps5
Slide-outs4
Fresh water86 gal
Grey water60 gal
Black water44 gal
Air conditioning13,500 BTU
Fuel100 gal
Generator8 kW Onan diesel generator

A missing row means the maker never published that figure — unknown, not zero.

WHERE PEOPLE SLEEP
  • Rear queen bed in slide(Permanent)
  • Sofa bed(Convertible)
  • Dinette(Convertible)
HOW IT'S BUILT — 4/5
WallsAzdel composite
FrameSteel
RoofStandard
UnderbellyEnclosed

Forest River (Mixed tier): Forest River

YEAR BY YEAR — WHAT CHANGED
  • 2008Introduced with the Berkshire line
  • 2012Final model year
FINDING ONE

Findable — a few listed nationwide most weeks. Why: Forest River is a volume manufacturer; 14 years out of production. Estimated from build volume and production span — not a count of live listings.

THE READ

First-generation 40-footer with a rear queen slide - the volume Berkshire of the 2008-2012 era.

OTHER BERKSHIRE FLOORPLANS
Is the 390QS your #1 — or just a spec sheet?

These are the facts. Whether it beats the other six thousand rigs for you depends on what you care about — set your priorities as sliders and watch the whole market re-rank around them. Nothing gets hidden, everything gets explained.

Rank it against your setup →

Data compiled from dealer and aggregator listings, retrieved 2026-07.